Was hoping this could be used to provide candid reviews of these products since official reviews from major websites are often tainted and frequently don't reflect real user experiences.
I have been a long time user of the original BPM and recently tried a BPM Connect. I have not tried the BPM + or BPM Core so hope that someone else can comment on those.
BPM Pros and Cons This is a relatively big but sturdy unit and design. It's got a good range (handles pretty large arms) and in my experience measures accurately compared to a real blood pressure monitor. However, it requires a successful bluetooth connection with a smartphone with the app installed on it. This is not completely reliable and sometimes goes out or just isn't doesn't connect properly. When it does work it displays the pressure as it goes up and down which is very helpful for understanding and seeing the BP being taken. You then know when exactly to relax and actually have an idea of what the BP should be since you can feel your pulse return and disappear with the actual pressure just like a real BP cuff. I have had from time to time the experience where the unit simply doesn't zero out. It's as if some air is retained. When this happens I often have to wait a few days before the unit works again. The worse experience is with the batteries. The cover is remarkably hard to remove without defacing and wrecking it. Presumably you can remove it with a quarter, but you have to press just right. This was one feature that really is a HUGE negative and Withings/Nokia doesn't make it easy to get replacement caps (as if they didn't know this is a problem). Others might not have experienced this issue and not have an issue with it. But for me I have never been able to press and turn something that requires a quarter to fit into a slight indentation.
BPM Connect Pros and Cons. Smaller more compact unit, but clearly NOT labeled to work for larger arms (see various reports on this). Worse the unit deflates very fast (probably 2-3x as fast as a regular BPM unit), much too fast to take an accurate reading and so it's constantly measuring the BP as higher than it is. Anywhere from 5-10 mm of mercury higher for systolic and diastolic by my count. If you are using this to compare your measurements from day to day this isn't a problem the unit has good precision, but if you want to know what your real BP is and have it match what the doctor's office says you will likely be measuring high. Imagine it like this, that you are trying to measure a moving target. If it moves slowly you can easily see where the changes are for hearing and not hearing the BP. If it moves really fast you are essentially guessing. The FDA probably doesn't care if you measure the BP a little high, but if you measure it low you can miss hypertension. So while this is probably not as accurate as a BPM it probably is within range (ie <10% off) for an FDA approval. This device has a built in rechargeable battery which is a HUGE plus compared to the old BPM. However, it means when the battery dies you have to get a new unit. However, you can avoid all the hassles of having to remove the @#*)@%&!*(&!!!! battery cap. The unit works completely independently of the application so you also DO NOT have the issues with bluetooth connections which is also a plus. However, NOT being able to see the pressure as it goes up and down is a big negative for me and was part of the experience. Many of us won't care, but I do. I think it helps to see what's going on and know when to relax to get the best readings. The display works, but can be a little hard to read as it is a dot matrix and if you miss it you have to do another reading or wait until in syncs with your app. The app syncing takes a few moments so it's longer than what the BPM did which was virtually immediate. Even a 5-10 second delay is a nuisance to someone used to seeing it right away.
For me, NOT having the unit measure as accurately is a bigger negative than all the positive benefits the unit has over the old BPM unit. However, that's just me. Others might not care so long as the unit is in the right ballpark and has good precision (ie you can use it to compare day to day readings and know if your BP is getting better or worse).
BPM + I saw that this unit is available somewhere and it appears to be an improvement on the BPM Connect and sort of between the original BPM and BPM Connect. I have not been able to try it and would love to hear any comments.
BPM Core Again saw this, but it's not available in the US. Can someone else review.